Users are recommended to use SOTE or to look at figure 
and Table to get an approximate idea as to how long an
observation will require. Remember that where several wavelength regions are
being observed merging will occur where it can.
To this time has to be added the 180 seconds for slewing to the target, or five minutes if it is a Solar-System Object. For Solar-System Objects, one AOT can only observe through one aperture.